This morning I took my three children to an internet cafe. Jay used the internet for 37 minutes and was charged $17.40, whilst Kay's 56 minutes cost $20.25 and Harry had to pay $19.05 for the 48 minutes that he spent online.Which of the following formulae does this cafe use to charge for its internet facilities?
Correct answer: C. $8.15 + $0.25 per minute
- A. $8.65 + $0.30 per minute
- B. $9.05 + $0.20 per minute
- C. $8.15 + $0.25 per minute
- D. $11.85 + $0.15 per minute
Explanation
The correct formula used by the cafe is $8.15 + $0.25 per minute. This can be deduced from the given data where the cost for each child's internet usage corresponds to this formula. Jay's cost of $17.40 for 37 minutes, Kay's cost of $20.25 for 56 minutes, and Harry's cost of $19.05 for 48 minutes all align with this formula. The other options do not match the data provided and can be eliminated as incorrect choices.
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